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Table 4 Univariate and multivariate analysis for ΔAG predicting hospital mortality

From: Association between delta anion gap and hospital mortality for patients in cardiothoracic surgery recovery unit: a retrospective cohort study

Variables

Odds ratios

β

95% confidence interval

p value

Univariate logistic regression

 ΔAG (≥ 7 vs < 7)

9.54

2.26

3.81–23.87

< 0.001

 ΔAG, continuous

1.24

0.21

1.16–1.32

< 0.001

 Gender (male vs female)

0.28

− 1.28

0.11–0.70

0.007

 Race (white vs non-white)

2.21

0.80

0.87–5.65

0.096

 Age

1.15

0.14

1.08–1.22

< 0.001

 Body mass index

0.99

0.00

0.93–1.08

0.986

 Serum Creatinine

1.34

0.29

1.12–1.61

0.002

 Urea nitrogen

1.04

0.04

1.03–1.06

< 0.001

 Lactate

1.87

0.62

1.55–2.24

< 0.001

 Base excess

0.75

− 0.28

0.70–0.82

< 0.001

 White blood cell

1.06

0.05

0.99–1.12

0.108

 AKF

8.87

2.18

3.55–22.21

< 0.001

 Acidosis

4.92

1.59

1.63–15.01

0.005

 Diabetes

1.24

0.21

0.49–3.15

0.655

 SAPSII

1.07

0.07

1.04–1.10

< 0.001

 SOFA

1.17

0.15

1.01–1.35

0.040

 SIRS

1.66

0.51

0.94–2.93

0.080

Multivariate logistic regression

 Model 1

  ΔAG, continuous

1.24

0.21

1.11–1.39

< 0.001

  Age

1.14

0.13

1.07–1.21

< 0.001

  Base excess

0.81

− 0.21

0.72–0.90

< 0.001

  AKF

14.87

2.69

2.81–77.55

0.001

  ΔAG × AKF

0.84

− 0.18

0.70–1.01

0.051

  Constant

 

− 15.69

− 20.98 to − 10.40

< 0.001

 Model 2

  ΔAG (≥ 7 vs < 7)

4.23

1.44

1.22–14.63

0.023

  Age

1.14

0.13

1.07–1.21

< 0.001

  Base excess

0.78

− 0.25

0.70–0.86

< 0.001

  AKF

7.81

2.06

1.59–38.47

0.011

  ΔAG × AKF

0.90

− 0.10

0.75–1.09

0.278

  1. The mean VIF of model 1 was 2.78
  2. AG anion gap, AKF acute kidney failure, SAPSII simplified acute physiology score II, SOFA sequential organ failure assessment, SIRS systemic inflammatory response syndrome